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Old 07-28-2008, 05:13 PM   #1
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Default Installed New Radio - Dash Lights Don't Work

Hi! I'm new to this and I just recently installed my pioneer deh 4800MP radio and i did cut the wires from the original radio and connected them to the pioneer. It works perfectly. I noticed the other night that my dash wasnt coming on. When i installed the radio i noticed that two wires, red and red/black, were'nt needed. I'm assuming that this is my problem?
Any help would be much appreciated
Thanks!
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Old 07-28-2008, 05:14 PM   #2
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Do your corner lights come on?

Small lights fuse, under hood.

Why did you not just buy the $10 adapter?
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Old 07-28-2008, 05:18 PM   #3
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all the lights on the inside work. they work during the day, it's just when i turn my head lights on they go off. and i wasnt aware of the $10 adapter, like i said i'm new to this.
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Old 07-28-2008, 05:31 PM   #4
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Did you cover the orange wires? If not and they shorted out, then it probably blew a fuse.
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Old 07-28-2008, 05:36 PM   #5
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corner lights, the exterior corner lights
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Old 07-28-2008, 05:45 PM   #6
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it doesnt have oragne wires, but i did cover the extra wires. the only other wire that was left on my radio was the blue wire which is for the remote. and yes the exterior corner lights do work. maybe its a fuse under the hood?
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Old 07-28-2008, 05:46 PM   #7
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It's not the small lights fuse if the corner lights work, you probably severed the dimming light circuit which controls the radio dimming and dash/etc
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Old 07-28-2008, 05:50 PM   #8
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so what should i do? do i have to buy a whole thing or is there anyway to bypass it?
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Old 07-28-2008, 06:01 PM   #9
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I don't know the circuit offhand.

Just look at the radio install guides (Accord FAQ) and see what those wires go to.

I'm going to wager it's part of the dimming circuit.
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Old 07-28-2008, 06:24 PM   #10
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i think it has to do with the multiplexer? im not really sure what that means or how much they cost. and im also not sure about the dimmer circuit either.
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Old 07-29-2008, 04:47 AM   #11
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Default Re: (Taylor1321)

have you tried something as simple as making sure the dimmer switch was plugged back in when you reinstalled the dash bezel? This more then likely has nothing to do with the radio, as the dash lights still work even with the radio unplugged. So, there are 3 things that happened. 1) you blew a fuse 2) you cut a wrong wire somewhere (not likly) and 3) you forgot to plug the dimmer switch back in.


Start with the basics. make sure everything is reconnected properly, then go back and make sure you didnt nick or cut any incorrect wires. The red/black wire from the radio harness is for the illumination of the RADIO only, not the whole dash, so it doesnt matter if its not connected. Plus, it serves no purpose on an after market deck as they do not come with dimmer control.
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Old 07-29-2008, 10:03 PM   #12
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Default Re: (Taylor1321)

it would be orange coming off the adapter if you had gotten it i think its brown on the factory harness(not sure, consult a manual) but it wouldnt hurt to check the underhood fuses though like muffin said if your exterior corner lights work it cant be the small light
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Old 07-30-2008, 05:18 AM   #13
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Default Re: Installed New Radio - Dash Lights Don't Work (Taylor1321)

MM&Y of car would help.

The unused red lead is dash light ground from "Dash Light Brightness Controller", the dash lights are dimmed by controlling the amount of ground they get.

The unused red/black is dash light power, [hot when park/head light switch is on].
Test for power on this lead with the head light switch on.

Both these leads need to be capped off if not used, as you say you have.

As already mentioned by JDM_DC4_Fanatic check the fuse for dash lights, make sure "Dash Light Brightness Controller", [dimmer control] is plugged in. Click the image to open in full size. 94
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Old 07-30-2008, 11:00 AM   #14
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it's a 2000 accord lx
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